Microchip Technology AC244055 Hoja De Datos

 2011-2013 Microchip Technology Inc.

DS40001574C-page 325

The Liquid Crystal Display (LCD) Driver module
generates the timing control to drive a static or
multiplexed LCD panel. In the PIC16(L)F193X device,
the module drives the panels of up to four commons
and up to 24 segments. The LCD module also provides
control of the LCD pixel data.
The LCD Driver module supports:
• Direct driving of LCD panel
• Three LCD clock sources with selectable prescaler
• Up to four common pins:

- Static (1 common)
- 1/2 multiplex (2 commons)
- 1/3 multiplex (3 commons)
- 1/4 multiplex (4 commons)

• Segment pins up to:

- 16 (PIC16(L)F1938)
- 24 (PIC16(L)F1939)

• Static, 1/2 or 1/3 LCD Bias

COM3 and SEG15 share the same physical
pin on the PIC16(L)F1938, therefore
SEG15 is not available when using 1/4
multiplex displays.

Data Bus

SEG<23:0>

To I/O Pads

LCDDATAx 

Registers

 

These are not directly connected to the I/O pads, but may be tri-stated, depending on the configuration of 
the LCD module.

SEG<23:0> on PIC16(L)F1939, SEG<15:0> on PIC16(L)F1938.

COM3 and SEG15 share the same physical pin on the PIC16(L)F1938, therefore SEG15 is not available 
when using 1/4 multiplex displays.

COM<3:0>

Clock Source

Timing Control

Select and

Prescaler

LFINTOSC

F

OSC

/256

T1OSC

To I/O Pads

LCDCON

LCDPS

LCDSEn

MUX